Delphinium Hummingbirds love delphinium, which blooms in early summer. Height for these perennials can average anywhere from 2 to 8 feet tall, depending on variety. Delphinium requires rich soil, and areas with relatively cool summers.
Cerinthe major purpurascens 'Blue Honeywort' or 'Blue Shrimp Plant' - Outstanding selection with grey green foliage and beautiful blue blooms. Easy to grow in full to part sun, great for bees and butterflies.